Patent US3769790A successfully refreshed from Google Patents.
US3769790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas turbine lubrication
Assignee: Motors Liquidation Co
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Filing: 1972-03-20
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Granted: 1973-11-06
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Expires: 1992-03-20
Abstract
Abstract A gas turbine engine includes an electric starter and an enginedriven pump for supplying lubricating and cooling oil to the engine, including supplying it to bearings which are located in a relatively enclosed and hot part of the engine. The pump also supplies oil to a power transfer clutch included in the engine. The oil pump is disabled while the engine is being cranked by the starter and also for a time after fuel is cut off to shut down the engine. The supply of lubricating oil is interrupted by a dump valve connected to the outlet of the engine-driven lubricating oil pump.
Inventors
- 👤 G Thebert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:37
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/18; F01D25/20; F01M; F01M11/00; F01M11/06; F01M11/062; F01M11/065; F01M11/067
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
A gas turbine engine comprising, in combination, a compressor, a combustion apparatus, at least one turbine, means for supplying lubricating and cooling oil to the engine, means for cranking the engine, and means for supplying fuel to the combustion apparatus of the engine including means for shutting off the fuel to shut down the engine, in combination with means for disabling the means for supplying oil during cranking of the engine and means operating concurrently with the means for shutting off fuel effective to disable the oil supplying means during coastdown of the engine.
Claim 2
Dependent Claim
94 words
A gas turbine engine comprising, in combination, a compressor, a combustion apparatus, at least one turbine, means for supplying lubricating and cooling oil to the engine, means for cranking the engine, and means for supplying fuel to the combustion apparatus of the engine including means for shutting off the fuel to shut down the engine, in combination with means for disabling the means for supplying oil during cranking of the engine and means operating concurrently with the means for shutting off fuel effective to disable the oil supplying means during coastdown of the engine.
Claim 3
Dependent Claim
116 words
A gas turbine engine comprising, in combination, a compressor, a combustion apparatus, at least one turbine, shaft bearings disposed in a hot location in the engine, means for supplying lubricating and cooling oil to the engine including at least means for supplying the oil to the said bearings, means for cranking the engine, and means for supplying fuel to the combustion apparatus of the engine including means for shutting off the fuel to shut down the engine, in combination with means for disabling the means for supplying oil during cranking of the engine and means operating concurrently with the means for shutting off fuel effective to disable the oil supplying means during coastdown of the engine.
Claim 4
Dependent Claim
116 words
A gas turbine engine comprising, in combination, a compressor, a combustion apparatus, at least one turbine, shaft bearings disposed in a hot location in the engine, means for supplying lubricating and cooling oil to the engine including at least means for supplying the oil to the said bearings, means for cranking the engine, and means for supplying fuel to the combustion apparatus of the engine including means for shutting off the fuel to shut down the engine, in combination with means for disabling the means for supplying oil during cranking of the engine and means operating concurrently with the means for shutting off fuel effective to disable the oil supplying means during coastdown of the engine.
Claim 5
Dependent Claim
172 words
A gas turbine engine comprising, in combination, a compressor, a combustion apparatus, at least one turbine, shaft bearings disposed in a hot location in the engine, means for supplying lubricating and cooling oil to the engine including at least means for supplying the oil to the said bearings, means for cranking the engine, and means for supplying fuel to the combustion apparatus of the engine including means for shutting off the fuel to shut down the engine, in combination with means for disabling the means for supplying oil during cranking of the engine and means operating concurrently with the means for shutting off fuel effective to disable the oil supplying means during coastdown of the engine, the means for disabling the oil supplying means including a dump valve connected to the oil supplying means, electrical actuating means for the dump valve, means for energizing the actuating means while the cranking means is energized, and relay means for energizing the actuating means for a predetermined time when the fuel shutoff means is actuated.
Claim 6
Dependent Claim
172 words
A gas turbine engine comprising, in combination, a compressor, a combustion apparatus, at least one turbine, shaft bearings disposed in a hot location in the engine, means for supplying lubricating and cooling oil to the engine including at least means for supplying the oil to the said bearings, means for cranking the engine, and means for supplying fuel to the combustion apparatus of the engine including means for shutting off the fuel to shut down the engine, in combination with means for disabling the means for supplying oil during cranking of the engine and means operating concurrently with the means for shutting off fuel effective to disable the oil supplying means during coastdown of the engine, the means for disabling the oil supplying means including a dump valve connected to the oil supplying means, electrical actuating means for the dump valve, means for energizing the actuating means while the cranking means is energized, and relay means for energizing the actuating means for a predetermined time when the fuel shutoff means is actuated.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |